/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements.  See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership.  The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License.  You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
<template>
  <main class="page">
    <slot name="top"/>

    <Content class="content" />

    <!-- <footer class="page-edit">
      <blockquote>
        <p>
          Anything unclear or missing?
          <a :href="commentLink" target="_blank" rel="noopener noreferrer">
            Leave a comment
          </a>
          <OutboundLink/> or <a
            :href="editLink"
            target="_blank"
            rel="noopener noreferrer"
          >{{ editLinkText }}</a>
          <OutboundLink/>
        </p>
        <small>
          <span class="prefix">{{ lastUpdatedText }}: </span>
          <span class="time">{{ lastUpdated }}</span>
        </small>
        
      </blockquote>
    </footer> -->

    <div class="page-nav" v-if="prev || next">
      <p class="inner">
        <span
          v-if="prev"
          class="prev"
        >
          ←
          <router-link
            v-if="prev"
            class="prev"
            :to="prev.path"
          >
            {{ prev.title || prev.path }}
          </router-link>
        </span>

        <span
          v-if="next"
          class="next"
        >
          <router-link
            v-if="next"
            :to="next.path"
          >
            {{ next.title || next.path }}
          </router-link>
          →
        </span>
      </p>
    </div>

    <!-- <slot name="bottom"/> -->
    <p style="text-align: center;">Copyright © 2020 The Apache Software Foundation.<br>
       Apache and the Apache feather logo are trademarks of The Apache Software Foundation</p>
    <!-- <p style="text-align:justify!important;paddingLeft:10px;paddingRight:10px;">
        Disclaimer: Apache IoTDB is an effort undergoing incubation at The Apache Software Foundation (ASF), sponsored by the Apache Incubator. Incubation is required of all newly accepted projects until a further review indicates that the infrastructure, communications, and decision making process have stabilized in a manner consistent with other successful ASF projects. While incubation status is not necessarily a reflection of the completeness or stability of the code, it does indicate that the project has yet to be fully endorsed by the ASF.
    </p>
    -->
  </main>
</template>

<script>
import { resolvePage, outboundRE, endingSlashRE } from '../util'

export default {
  props: ['sidebarItems'],

  computed: {
    lastUpdated () {
      return this.$page.lastUpdated
    },

    lastUpdatedText () {
      if (typeof this.$themeLocaleConfig.lastUpdated === 'string') {
        return this.$themeLocaleConfig.lastUpdated
      }
      if (typeof this.$site.themeConfig.lastUpdated === 'string') {
        return this.$site.themeConfig.lastUpdated
      }
      return 'Last Updated'
    },

    prev () {
      const prev = this.$page.frontmatter.prev
      if (prev === false) {
        return
      } else if (prev) {
        return resolvePage(this.$site.pages, prev, this.$route.path)
      } else {
        return resolvePrev(this.$page, this.sidebarItems)
      }
    },

    next () {
      const next = this.$page.frontmatter.next
      if (next === false) {
        return
      } else if (next) {
        return resolvePage(this.$site.pages, next, this.$route.path)
      } else {
        return resolveNext(this.$page, this.sidebarItems)
      }
    },

    editLink () {
      if (this.$page.frontmatter.editLink === false) {
        return
      }
      const {
        repo,
        editLinks,
        docsDir = '',
        docsBranch = 'master',
        docsRepo = repo
      } = this.$site.themeConfig

      if (docsRepo && editLinks && this.$page.relativePath) {
        return this.createEditLink(repo, docsRepo, docsDir, docsBranch, this.$page.relativePath)
      }
    },

    commentLink () {
      const {
        repo,
        docsRepo = repo
      } = this.$site.themeConfig

      return (outboundRE.test(docsRepo)
        ? docsRepo
        : `https://github.com/${docsRepo}`) +
        `/issues/new?title=Comment: ${this.$page.title} (${this.$page.relativePath})`
    },

    editLinkText () {
      return (
        this.$themeLocaleConfig.editLinkText
        || this.$site.themeConfig.editLinkText
        || `Edit this page`
      )
    }
  },

  methods: {
    createEditLink (repo, docsRepo, docsDir, docsBranch, path) {
      const bitbucket = /bitbucket.org/
      if (bitbucket.test(repo)) {
        const base = outboundRE.test(docsRepo)
          ? docsRepo
          : repo
        return (
          base.replace(endingSlashRE, '')
           + `/src`
           + `/${docsBranch}/`
           + (docsDir ? docsDir.replace(endingSlashRE, '') + '/' : '')
           + path
           + `?mode=edit&spa=0&at=${docsBranch}&fileviewer=file-view-default`
        )
      }

      const base = outboundRE.test(docsRepo)
        ? docsRepo
        : `https://github.com/${docsRepo}`
      return (
        base.replace(endingSlashRE, '')
        + `/edit`
        + `/${docsBranch}/`
        + (docsDir ? docsDir.replace(endingSlashRE, '') + '/' : '')
        + path
      )
    }
  }
}

function resolvePrev (page, items) {
  return find(page, items, -1)
}

function resolveNext (page, items) {
  return find(page, items, 1)
}

function find (page, items, offset) {
  const res = []
  flatten(items, res)
  for (let i = 0; i < res.length; i++) {
    const cur = res[i]
    if (cur.type === 'page' && cur.path === decodeURIComponent(page.path)) {
      return res[i + offset]
    }
  }
}

function flatten (items, res) {
  for (let i = 0, l = items.length; i < l; i++) {
    if (items[i].type === 'group') {
      flatten(items[i].children || [], res)
    } else {
      res.push(items[i])
    }
  }
}

</script>

<style lang="stylus">
@require '../styles/wrapper.styl'

.page
  padding-bottom 2rem
  display block

.page-edit
  @extend $wrapper
  padding-top 0
  padding-bottom 1rem
  overflow auto
  .edit-link
    display inline-block
    a
      color lighten($textColor, 25%)
      margin-right 0.25rem
  .last-updated
    float right
    font-size 0.9em
    .prefix
      font-weight 500
      color lighten($textColor, 25%)
    .time
      font-weight 400
      color #aaa

.page-nav
  @extend $wrapper
  padding-top 1rem
  padding-bottom 0
  .inner
    min-height 2rem
    margin-top 0
    border-top 1px solid $borderColor
    padding-top 1rem
    overflow auto // clear float
  .next
    float right

@media (max-width: $MQMobile)
  .page-edit
    .edit-link
      margin-bottom .5rem
    .last-updated
      font-size .8em
      float none
      text-align left

</style>
